JP2794129B2 - Feeding control method and device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a feed control method and apparatus for controlling a feed amount of a feeder mounted on a buoy, and more particularly to a feed control method that exceeds the quantity of fish swarming around a buoy. The present invention relates to a feed control method and apparatus that can measure an acoustic wave and feed an optimum feed amount corresponding to the measured amount of a school of fish.

(Prior Art) In recent years, buoys for acoustic feeding have tended to be installed on the Japanese coast in order to improve the productivity of coastal fisheries. The acoustic feeding buoy is a buoy for automatically transmitting sound and food from the buoy at a certain time and feeding the fish gathering around the buoy.

FIG. 6 is a diagram showing the configuration of a conventional acoustic feeding buoy,
It comprises a timer 1 for managing a control sequence, a sound emitting device 2 for emitting ultrasonic waves for fish gathering, a feeder 3, and a battery 4. FIG. 7 shows a control sequence of a conventional feeding control method, in which (a) shows a sound emission sequence,
(B) is a feeding sequence. (A) and (b) in the figure
The operation continuation time is fixed at the set value of the timer 1 and has no relation to the amount of fish school gathering around the buoy.

(Problems to be Solved by the Invention) The amount of food required by the fish varies according to the season and the growth of the fish.
It needs to be changed according to the amount of fish school around the buoy.

At present, the residual food due to the large amount of feed is becoming a problem in relation to marine pollution, and it is necessary to take measures including economics.

(Means for Solving the Problems) In order to solve such problems, the present invention uses a fish finder with a built-in Time Varied Gain circuit (hereinafter referred to as TVG) that automatically corrects propagation attenuation of underwater ultrasonic waves. In this embodiment, the amount of fish schooling around a buoy is measured, and the optimum amount of feeding is calculated according to the amount to feed the fish, and the embodiment will be described in detail with reference to the drawings.

(Embodiment) FIG. 1 is a diagram showing the configuration of an acoustic feeding buoy showing an example to which the present invention is applied, and includes a timer 1, a sound emitter 2, a feeder 3,
It comprises a battery 4, a fish school quantity measuring transducer / transmitter / receiver 5, a fish school quantity measuring fish finder 6, and a feed quantity control unit 7 for controlling the feed quantity. FIG. 2 shows an example of a control sequence of a feed control method according to an embodiment of the present invention, wherein (c) is a sequence of a fish finder, (a) is a sound emission sequence,
(D) is a sequence for calculating a feed amount corresponding to the amount of fish school gathered around the buoy, and (e) is a sequence during feeding. The feeding continuation time T1 to T5 in (e) in the figure is not set by the timer 1, but is set based on the feeding amount calculation result in (d). FIG. 3 is a block diagram showing the configuration of a feed control device according to one embodiment of the present invention, wherein 8 is a transmission pulse generating circuit, 9 is a power amplifier circuit, 5 is a transducer, and 10 is a TV.
G circuit, 11 is a detection circuit, 12 is an integration circuit, 13 is a feed amount calculation circuit, and 14 is a feed control output circuit. Hereinafter, this operation will be described. The ultrasonic pulse generated in the transmission pulse generation circuit 8 and amplified in power by the power amplification circuit 9 and transmitted into the water via the transmission / reception device 5 is reflected from a school of fish gathering around the buoy and receives the transmission / reception. The wave is received by the wave device 5 and converted into an electric signal. The converted electric signal is corrected by a TVG circuit 10 for correcting propagation attenuation, and then converted to a DC signal by a detection circuit 11. The DC signal is integrated by the integrating circuit 12 for several to several tens of transmissions, and an average power corresponding to the amount of fish school is calculated. The feed amount calculation circuit 13 determines a feed amount corresponding to the average power. FIG. 4 shows the correspondence between the average power and the feed amount, wherein (f) is the average power and (g) is the feed amount. Both satisfy the following relationship.

Feeding amount = 0 (0 <average power <PW1) Feeding amount = BT1 (PW1 <average power <PW2) Feeding amount = BT2 (PW2 <average power <PW3) Feeding amount = BT3 (PW3 <average power <PW4) Feeding amount = BT4 (PW4 ≦ average power <PW5) The calculated feed amount information is input to the feed control output circuit 14, and outputs a feed control signal corresponding to the feed amount information. Fifth
The figure shows one method of feeding amount control, and shows a sequence of a feeding start signal and a feeding end signal corresponding to the calculated feeding amount information (B1 to B4). In the figure, (d) is the sequence of the feed amount calculation, (h) is the sequence of the feed start signal,
(I) shows a sequence of a feed end signal, and (e) shows a sequence during feeding. Calculated feed amount information (B1-B
4) and the duration of feeding (P1 ~ P4) satisfy the following relationship.

P1>P4>P2> P3 However, in the case of B1>B4>B2> B3 In the above-mentioned embodiment, the feeding amount per unit time is constant, and the feeding time per unit time (Pn) is adjusted to calculate the product. Although it is shown, other means, for example, the feeding time (Pn) may be fixed and the feeding amount per unit time may be adjusted.

Further, it goes without saying that various modes such as control by a telemeter system are possible without departing from the gist of the present invention.

(Effects of the Invention) As described above, it is possible to optimally control the feeding amount according to the amount of fish schooling around the buoy, so that the remaining feeding which is a problem in the conventional feeding method is used. This has the effect of improving the occurrence of marine pollution and inefficient feeding methods.

[Brief description of the drawings]

FIG. 1 is a diagram showing an apparatus configuration of an acoustic feeding buoy showing an example to which the present invention is applied, FIG. 2 is a sequence of a feeding control method according to one embodiment, and FIG. 3 is a block diagram of a feeding control device according to one embodiment. FIG. 4 is a diagram showing the correspondence between the average power and the amount of feed, FIG. 5 is a diagram showing a method of controlling the amount of feed, FIG. 6 is a diagram showing the configuration of a conventional acoustic feeding buoy, and FIG. 4 is a sequence of a method. 1 ... timer, 2 ... sound emitter, 3 ... feeder, 4 ... battery, 5 ... transducer, 6 ... fish finder, 7 ...
Feed amount control unit, 8: transmission pulse generation circuit, 9: power amplification circuit, 10: TVG circuit, 11: detection circuit, 12: integration circuit, 13: feed amount calculation circuit, 14: feeding Control output circuit.

Claims (2)

(57) [Claims] 1. A predetermined reference clock pulse is converted into an ultrasonic pulse and transmitted underwater, and an electric signal related to a reflected echo from a school of fish that is swarming around the buoy is integrated for a predetermined time to correspond to the quantity of the school of fish. A feed control method comprising: obtaining an electric signal, determining a feed amount according to the level of the integrated electric signal, and feeding an optimum feed amount corresponding to an amount of fish school around the buoy. 2. A transmitter for converting a clock pulse generated by a transmission pulse generation circuit into an ultrasonic signal and transmitting the ultrasonic signal underwater;
A receiver that receives the reflected echoes from the school of fish that are swarming around the buoy and converts it into an electrical signal, and an amplification that increases according to the propagation time of the ultrasonic echo from the point of transmission when this electrical signal is input A TVG circuit that amplifies the electric signal and automatically corrects the propagation attenuation, a detection circuit that performs amplitude detection on the output of the TVG circuit, an integration circuit that integrates the detected DC signal for a certain period of time, A feed control device comprising: a feed amount calculation circuit that determines a feed amount according to a level; and a feed control output circuit that outputs a feed control signal to the outside according to the determined feed amount.